反应详情

Potassium carbonate (162 mg) was added to 221 mg of 2-(2-(4-(4-hydroxyphenyloxy)phenyl)acetylamino)benzoic acid methyl ester obtained by the Reference Example 24, the mixture was suspended in dried DMF (5 ml), t-butyl bromoacetate (130 μl) was added little by little to the suspension at room temperature, and the mixture was stirred as it is over a night at room temperature. After completing the reaction, DMF was distilled out under reduced pressure and the product was extracted with ethyl acetate. The organic layer was washed with saturated aqueous solution of potassium bisulfate and dried with anhydrous magnesium sulfate. After removing the solvent by distillation, the residue was purified by silica gel column chromatography (developing liquid: hexane:ethyl acetate 4:1 to 1:1) to obtain 174 mg of the subject compound. The 1H-NMR of the compound was consistent with the above structure.

1. customobtained by the Reference Example 24
2. waitis over a night at room temperature
3. distillationwas distilled out under reduced pressure
4. extractionthe product was extracted with ethyl acetate
5. washThe organic layer was washed with saturated aqueous solution of potassium bisulfate
6. dry with materialdried with anhydrous magnesium sulfate
7. customAfter removing the solvent
8. distillationby distillation
9. customthe residue was purified by silica gel column chromatography (developing liquid: hexane:ethyl acetate 4:1 to 1:1)